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pav-90 [236]
3 years ago
15

There are 35 competitors in a marathon. Sixty percent of these finished the race in under four hrs. How many did not?

Mathematics
1 answer:
Nikitich [7]3 years ago
7 0

Answer:

14 did not finish under 4 hours.

Step-by-step explanation:

Givens

Total number of competitors = 35

% who finish under 4 hours = 60%

Formula

Those who did not = 35 - 60%*35

Solution

Those who did finish under 4 hours = 35 * 60%

Those who did finish under 4 hours = 35*60/100 = 2100/100

Those who did finish under 4 hours = 21

Those who did not = 35 - 35*60/100

Those who did not = 35 - 21

Those who did not = 14

====================

There is another way to do this. Realize that 40% did not finish the race in under 4 hours.

Those who did not finish in under 4 hours = 35*40/100 = 1400 / 100 = 14

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malfutka [58]
Hi. You have to do trial and error with each of the choices to see which of those apply. They are points on the given function y=22x+32 that lie on point (x,y). Just substitute the x-and y values to the function.

a. (10,480) => x = 10, y = 480
     y = 480 = 22(10) + 32
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b. (5,142) => x = 5, y = 142
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c. (8,208) => x = 8, y = 208
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The answer is B and C.
3 0
3 years ago
Share $600 between Anna and Raman in the ratio 3:7 and 1:4
Ulleksa [173]

Answer:

3 : 7 =>

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Raman = $420

1 : 4 =>

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Raman = $480

Step-by-step explanation:

<u>Shares when ratio is 3 : 7</u>

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Sum of ratio 10

Anna's share=

                   \frac{3}{10} \times 600 = \$  180

Raman 's share=

                  \frac{7}{10} \times 600 = \$ 420

<u>Shares when ratio is 1 : 4</u>

Anna : Raman = 1 : 4

Sum of ratio = 5

Anna 's share =

                   \frac{1}{5} \times 600 = \$ 120

Raman's share =

                  \frac{4}{5} \times 600 = \$ 480

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Answer:

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